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SodaStream Shares Plunged: What You Need to Know

Is this meaningful? Or just another movement?

Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of SodaStream International(Nasdaq: SODA), which manufactures home beverage carbonation systems, sank 10% Monday after filing a registration statement for a proposed follow-on public offering.

So what: In total, the company announced plans to sell an aggregate of 5 million ordinary shares -- 1.2 million of which will be issued by SodaStream and 3.8 million of which will be sold by "certain selling shareholders." So between the possibility of dilution triggered by the share issuance and the usual concerns associated with heavy insider selling, it's no surprise that Mr. Market isn't taking too kindly to the news.

Now what: I wouldn't be so quick to pounce on today's plunge. Even with the double-digit drop, SodaStream is still up more than 70% since its November IPO and trades at a lofty-ish P/E of 44. When you couple those bubble-suggesting stats with today's share-sale announcement, it's tough not to follow the company's lead.